Calking mechanism for holding mobile winching units



April 28, 1953 f w F NIEDENTHAL 2,636,577 CALKING MECHANISM FOR HOLDINGMOBILE WINCHING UNITS Filed Feb. 17, 1950 ilz'fijviedenzkaz INVENTOR I II ATTORNEYS Patented Apr. 28, 1953 UNITED STATES PATENT OFFICE CALKINGMECHANISM FOR HOLDING MOBILE WINCHING UNITS 1 Claim.

This invention relates to a mechanical calking or chock mechanismdesigned primarily for holding mobile winching units while winchingoperations are being performed.

An important object of the invention is to provide a calking or chockunit which is hingedly connected to the frame of the winching unit insuch a manner that it will automatically release when the winching unitis moved forwardly, opposite to the direction in which the calking unitis held, thereby securely holding the mobile winching unit againstslipping backwardly on ice or snow, or under the weight of the vehicleor device on which the winching operations are being performed.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention consists of certain novel details ofconstruction and combinations of parts hereinafter more fully describedand pointed out in the claim, it being understood that changes may bemade in the construction and arrangement of parts without departing fromthe spirit of the invention as claimed.

Referring to the drawing Figure 1 is a perspective view illustrating therear end of the chassis of a mobile winching unit, with the calkingattachment mounted thereon.

Fig. 2 is a perspective view taken from the forward side of the calkingmechanism.

Referring to the drawing in detail, the reference character 5 indicatesthe side rails of the chassis of a mobile winching unit, the side rails5 being connected at their rear ends, by means of the cross bar 6.

Bolted to the outer surfaces of the side rails 5, are supporting arms Ito which the side bars 8 of the calking or checking mechanism arepivotally connected, as by means of the bolts 9.

The free ends of the side bars 8 are welded to the I beam l0 and theconnection. between the bars 8 and I beam l 0, is braced by means of thebrace bars II that are shown as welded to the side bars 8 and I beam ID.1

Transverse bars l2 connect with the side bars 8, and are held inparallel spaced relation with respect to each other, the bars 12 beingconnected intermediate their ends by means of the bar [3 which is weldedthereto, while the angularly disposed bars 14, connect the bars l2bracing them against movement with respect to each other.

Formed on the lower outer edge of the lower flange l5 of the beam 10,are calks I6 which are adapted to dig into the ground surface when theapparatus is lowered to calk the winch unit with which it is connected,during winching operations, the construction of the beam l0 andsupporting mechanism being such that when the free end of the apparatusis lowered to the ground, the frame approximately parallels the averagedirection of pull of the winching unit. It will also be noted that thecalking unit is mounted so that it releases automatically when thewinching unit is moved forwardly, opposite to the direction in which itis held, and catches and holds against any backward movement of theunit, thereby preventing slipping of the mobile winching unit, duringwinching operations.

Mounted on the upper surfaces of the side rails 5, are bearings 11, inwhich the shaft I8 operates, there being a pawl and ratchet mechanism I9for controlling rotation of the shaft l8.

Wound on the shaft I8, is the flexible cable 20 which also connects withthe beam H! by its passing through an opening formed intermediate theends of the beam 10, the portion of the flexible cable being thensecured adjacent to the opening.

On one end of the shaft is an operating handle 2! by means of which theshaft [8 may be rotated to wind the cable 20 thereon elevating the beamHi to its inactive position, or the handle may be operated to allow thecable to unwind in lowering the beam [0 to its active or calkingposition.

From the foregoing it will be seen that due to the construction shownand described, I have provided a calking mechanism for use in connectionwith mobile winching units, which may be readily lowered into contactwith the ground surface, preventing movement of the mobile winching unitwhile winching operations are being performed.

Having thus described the invention, what is claimed is:

A calking device adapted to be attached to the rear ends of the siderails of mobile winching units comprising a frame including downwardlyinclined supporting arms adapted to be secured to a winching unit atopposite sides thereof, side bars pivotally connected with thesupporting arms at the free ends thereof, said side bars extendingrearwardly from the supporting arms. a transversely disposed I-beam towhich said side bars are welded, bars welded to the upper surface of theI-beam and side bars, cross bars connecting the sidebars of the frame,spaced calks extending from the I-beam adapted to dig into the groundsurface calking the winching unit, an operating shaft mounted on theside rails of the winching unit, a cable connected with said I-beam andwound on said shaft, said cable effecting adjustment of said I-beamvertically, and means for operating said shaft.

WILLIAM F. NIEDENTHAL.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 1,719,313 Scott July 2, 1929 FOREIGN PATENTS Number CountryDate 314,643 Great Britain July 4, 1929 316,963 Great Britain "Aug. 7,1929

